单词：homologous gene
homologous gene的用法和样例：
例句
- Activation of an internal gene requires generation of new sequences.内源基因的激活需要新序列的产生。
- Only about one out of a million cells will correctly incorporate a foreign gene using the most common versions of this technique.应用这种最常规的技术，仅有百万分之一的细胞可以正确加人外源基因。
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